From patchwork Wed Feb 24 10:55:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sumera Priyadarsini X-Patchwork-Id: 12101691 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6050EC433DB for ; Wed, 24 Feb 2021 10:55:21 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DE68960232 for ; Wed, 24 Feb 2021 10:55:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DE68960232 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0CB916E8B4; Wed, 24 Feb 2021 10:55:16 +0000 (UTC) Received: from mail-pg1-x530.google.com (mail-pg1-x530.google.com [IPv6:2607:f8b0:4864:20::530]) by gabe.freedesktop.org (Postfix) with ESMTPS id 882456E8B4 for ; Wed, 24 Feb 2021 10:55:14 +0000 (UTC) Received: by mail-pg1-x530.google.com with SMTP id n10so1187243pgl.10 for ; Wed, 24 Feb 2021 02:55:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition; bh=OZmIVnGmRqkHE37MUl/fX1v3MBrD7OJUk4oQyf7Ar5g=; b=Fu+y56orWSMafFuHJB2gQRcLudSEvPXsixZHWx3Vzhm2lfXeA7URLfZREhMOQa9sT5 janTkD99fgLif91bCE6c+8aSnxVAgrdZYJ4OuRQvAEkRd6dK/cz9L96Gy5Z5X/2O6Ee2 zaJ/IjrC/aCL+3ObzCALLw9T7D2sydC5HAEgRun1cAy3ylEHZInXS4B86pFHUHj07BeF AMG3PCWCZ90V8FPYhlRgggq6AM5KJ3WSu0yKFZ6oC9zoQt0HQ8w/PH5pUh+o4hnwvGDu Dc8qx9/oe3DohUddBCu3C3x988pov4KHCsHljoU2L01q0/JM4/zRD7arrZm2Vu6wGdCU vTWA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition; bh=OZmIVnGmRqkHE37MUl/fX1v3MBrD7OJUk4oQyf7Ar5g=; b=aAvXuDUGOgRgdk5SqW/Tph0jRkG8OmLP/ZdrvJg9fc4nSexwHmlSnrxFzxZSgMWlyc wjeoSakZHXzw5gx7uZ5YSAFEgPCUox+71lCQvaB5qttcAestpfqiaCYVxcsCkBzixzSj 3fCoF3A+2i2omxe9YuQbk6tq5xx5akbhAF39KaMXR7nMfLxlfJFOg7ssnGxCIJXLa3po FE4r9J6PqjEB9KPEkCBxOW63PiiOnYmny81BHv+/We3907p6G3JnHwnW7iO0RSMe6YTC gzGVhKsfY9xbACNMTk6U3FfhfHfkS+ILFSu6aSSk33NZABxmh7x9dfBiASibn7Udcfax 7P0w== X-Gm-Message-State: AOAM5311WhC/iQ/9Upv5iCt2Jj6laVXko4R0L5vMVgs8cEtZkEIJ3S0n 0du/gUjZb2Sk2vwEzxchwFUQegja/U/hb6S2 X-Google-Smtp-Source: ABdhPJx2XG1jvVXnVdy5x9YOEOPUi1q6X7TnP1iA4ycsuVFhLsB7/6g4EQ16mHtGGG8vOjHLZqlilg== X-Received: by 2002:a63:1409:: with SMTP id u9mr27776845pgl.312.1614164114133; Wed, 24 Feb 2021 02:55:14 -0800 (PST) Received: from adolin ([49.207.196.12]) by smtp.gmail.com with ESMTPSA id x2sm2269603pfi.220.2021.02.24.02.55.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Feb 2021 02:55:13 -0800 (PST) Date: Wed, 24 Feb 2021 16:25:09 +0530 From: Sumera Priyadarsini To: melissa.srw@gmail.com Subject: [RFC PATCH] drm/vkms: Add support for virtual hardware mode Message-ID: <20210224105509.yzdimgbu2jwe3auf@adolin> MIME-Version: 1.0 Content-Disposition: inline X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: hamohammed.sa@gmail.com, rodrigosiqueiramelo@gmail.com, airlied@linux.ie, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a virtual hardware or vblank-less mode as a module to enable VKMS to emulate virtual graphic drivers. This mode can be enabled by setting enable_virtual_hw=1 at the time of loading VKMS. A new function vkms_crtc_composer() has been added to bypass the vblank mode and is called directly in the atomic hook in vkms_atomic_begin(). However, some crc captures still use vblanks which causes the crc-based igt tests to crash. Currently, I am unsure about how to approach one-shot implementation of crc reads so I am still working on that. This patch has been tested with the igt tests, kms_writeback, kms_atomic, kms_lease, kms_flip, kms_pipe_get_crc and preserves results except for subtests related to crc reads and skips tests that rely on vertical blanking. This patch must be tested after incorporating the igt-tests patch: https://lists.freedesktop.org/archives/igt-dev/2021-February/029355.html . The patch is based on Rodrigo Siqueira's patch(https://patchwork.freedesktop.org/patch/316851/?series=48469&rev=3) and the ensuing review. Signed-off-by: Sumera Priyadarsini --- drivers/gpu/drm/vkms/vkms_composer.c | 46 ++++++++++++++++++++++++++++ drivers/gpu/drm/vkms/vkms_crtc.c | 17 ++++++++-- drivers/gpu/drm/vkms/vkms_drv.c | 18 ++++++++--- drivers/gpu/drm/vkms/vkms_drv.h | 2 ++ 4 files changed, 75 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c index 66c6842d70db..7a8aaf5c5555 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.c +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -247,6 +247,52 @@ void vkms_composer_worker(struct work_struct *work) drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32); } +void vkms_crtc_composer(struct vkms_crtc_state *crtc_state) +{ + struct drm_crtc *crtc = crtc_state->base.crtc; + struct vkms_output *out = drm_crtc_to_vkms_output(crtc); + struct vkms_composer *primary_composer = NULL; + struct vkms_composer *cursor_composer = NULL; + void *vaddr_out = NULL; + u32 crc32 = 0; + int ret; + bool wb_pending; + + wb_pending = crtc_state->wb_pending; + + if (crtc_state->num_active_planes >= 1) + primary_composer = crtc_state->active_planes[0]->composer; + + if (crtc_state->num_active_planes == 2) + cursor_composer = crtc_state->active_planes[1]->composer; + + if (!primary_composer) + return; + + if (wb_pending) + vaddr_out = crtc_state->active_writeback; + + ret = compose_planes(&vaddr_out, primary_composer, cursor_composer); + if (ret) { + if (ret == -EINVAL && !wb_pending) + kfree(vaddr_out); + return; + } + + crc32 = compute_crc(vaddr_out, primary_composer); + + if (wb_pending) { + drm_writeback_signal_completion(&out->wb_connector, 0); + spin_lock_irq(&out->composer_lock); + crtc_state->wb_pending = false; + spin_unlock_irq(&out->composer_lock); + } else { + kfree(vaddr_out); + } + + drm_crtc_add_crc_entry(crtc, true, 0, &crc32); +} + static const char * const pipe_crc_sources[] = {"auto"}; const char *const *vkms_get_crc_sources(struct drm_crtc *crtc, diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c index 6164349cdf11..38de791a4882 100644 --- a/drivers/gpu/drm/vkms/vkms_crtc.c +++ b/drivers/gpu/drm/vkms/vkms_crtc.c @@ -224,13 +224,19 @@ static int vkms_crtc_atomic_check(struct drm_crtc *crtc, static void vkms_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_state *state) { - drm_crtc_vblank_on(crtc); + struct vkms_device *vkmsdev = drm_device_to_vkms_device(crtc->dev); + + if (!vkmsdev->config->virtual_hw) + drm_crtc_vblank_on(crtc); } static void vkms_crtc_atomic_disable(struct drm_crtc *crtc, struct drm_atomic_state *state) { - drm_crtc_vblank_off(crtc); + struct vkms_device *vkmsdev = drm_device_to_vkms_device(crtc->dev); + + if (!vkmsdev->config->virtual_hw) + drm_crtc_vblank_off(crtc); } static void vkms_crtc_atomic_begin(struct drm_crtc *crtc, @@ -248,8 +254,13 @@ static void vkms_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_atomic_state *state) { struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc); + struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(crtc->state); + struct vkms_device *vkmsdev = drm_device_to_vkms_device(crtc->dev); + + if (vkmsdev->config->virtual_hw) + vkms_crtc_composer(vkms_state); - if (crtc->state->event) { + if (crtc->state->event && !vkmsdev->config->virtual_hw) { spin_lock(&crtc->dev->event_lock); if (drm_crtc_vblank_get(crtc) != 0) diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c index 2173b82606f6..945c4495d62a 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.c +++ b/drivers/gpu/drm/vkms/vkms_drv.c @@ -44,6 +44,11 @@ static bool enable_writeback = true; module_param_named(enable_writeback, enable_writeback, bool, 0444); MODULE_PARM_DESC(enable_writeback, "Enable/Disable writeback connector support"); +static bool enable_virtual_hw = false; +module_param_named(enable_virtual_hw, enable_virtual_hw, bool, 0444); +MODULE_PARM_DESC(enable_virtual_hw, "Enable/Disable virtual hardware mode(virtual \ +hardware mode disables vblank interrupts)"); + DEFINE_DRM_GEM_FOPS(vkms_driver_fops); static void vkms_release(struct drm_device *dev) @@ -159,12 +164,14 @@ static int vkms_create(struct vkms_config *config) goto out_devres; } - vkms_device->drm.irq_enabled = true; + vkms_device->drm.irq_enabled = !vkms_device->config->virtual_hw; - ret = drm_vblank_init(&vkms_device->drm, 1); - if (ret) { - DRM_ERROR("Failed to vblank\n"); - goto out_devres; + if (!vkms_device->config->virtual_hw) { + ret = drm_vblank_init(&vkms_device->drm, 1); + if (ret) { + DRM_ERROR("Failed to vblank\n"); + goto out_devres; + } } ret = vkms_modeset_init(vkms_device); @@ -198,6 +205,7 @@ static int __init vkms_init(void) config->cursor = enable_cursor; config->writeback = enable_writeback; + config->virtual_hw = enable_virtual_hw; return vkms_create(config); } diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h index 35540c7c4416..d4a45518639c 100644 --- a/drivers/gpu/drm/vkms/vkms_drv.h +++ b/drivers/gpu/drm/vkms/vkms_drv.h @@ -85,6 +85,7 @@ struct vkms_device; struct vkms_config { bool writeback; bool cursor; + bool virtual_hw; /* only set when instantiated */ struct vkms_device *dev; }; @@ -127,6 +128,7 @@ int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name, /* Composer Support */ void vkms_composer_worker(struct work_struct *work); void vkms_set_composer(struct vkms_output *out, bool enabled); +void vkms_crtc_composer(struct vkms_crtc_state *crtc_state); /* Writeback */ int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);